{"id":"UBUNTU-CVE-2026-106435","details":"The MongoDB Python Driver's binary accelerator can read outside a buffer when an application decodes malformed BSON containing a truncated regular-expression element without a trailing NUL byte. An actor who can supply BSON to the documented decode or decode_all API can cause the application process to terminate when the C extension is loaded. The driver's normal database wire-protocol path does not reach this code.","modified":"2026-10-14T03:22:47.530890409Z","published":"2026-10-13T00:00:00Z","upstream":["CVE-2026-106435"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-106435"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-106435"},{"type":"REPORT","url":"https://jira.mongodb.org/browse/PYTHON-6110"}],"affected":[{"package":{"name":"pymongo","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/pymongo?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.6-1","2.6.2-1","2.6.3-1","2.6.3-1build1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.6.3-1build1","binary_name":"python-bson"},{"binary_name":"python-bson-ext","binary_version":"2.6.3-1build1"},{"binary_name":"python-gridfs","binary_version":"2.6.3-1build1"},{"binary_version":"2.6.3-1build1","binary_name":"python-pymongo"},{"binary_name":"python-pymongo-ext","binary_version":"2.6.3-1build1"},{"binary_name":"python3-bson","binary_version":"2.6.3-1build1"},{"binary_name":"python3-bson-ext","binary_version":"2.6.3-1build1"},{"binary_name":"python3-gridfs","binary_version":"2.6.3-1build1"},{"binary_name":"python3-pymongo","binary_version":"2.6.3-1build1"},{"binary_name":"python3-pymongo-ext","binary_version":"2.6.3-1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-106435.json"}},{"package":{"name":"pymongo","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/pymongo?arch=source&distro=esm-infra%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.3-1","3.2-1","3.2-1build1","3.2-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"python-bson","binary_version":"3.2-1ubuntu0.1~esm1"},{"binary_version":"3.2-1ubuntu0.1~esm1","binary_name":"python-bson-ext"},{"binary_name":"python-gridfs","binary_version":"3.2-1ubuntu0.1~esm1"},{"binary_name":"python-pymongo","binary_version":"3.2-1ubuntu0.1~esm1"},{"binary_version":"3.2-1ubuntu0.1~esm1","binary_name":"python-pymongo-ext"},{"binary_version":"3.2-1ubuntu0.1~esm1","binary_name":"python3-bson"},{"binary_name":"python3-bson-ext","binary_version":"3.2-1ubuntu0.1~esm1"},{"binary_name":"python3-gridfs","binary_version":"3.2-1ubuntu0.1~esm1"},{"binary_name":"python3-pymongo","binary_version":"3.2-1ubuntu0.1~esm1"},{"binary_name":"python3-pymongo-ext","binary_version":"3.2-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-106435.json"}},{"package":{"name":"pymongo","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/pymongo?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.4.0-1build2","3.6.1+dfsg1-1","3.6.1+dfsg1-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"3.6.1+dfsg1-1ubuntu0.1~esm1","binary_name":"python-bson"},{"binary_version":"3.6.1+dfsg1-1ubuntu0.1~esm1","binary_name":"python-bson-ext"},{"binary_name":"python-gridfs","binary_version":"3.6.1+dfsg1-1ubuntu0.1~esm1"},{"binary_version":"3.6.1+dfsg1-1ubuntu0.1~esm1","binary_name":"python-pymongo"},{"binary_name":"python-pymongo-ext","binary_version":"3.6.1+dfsg1-1ubuntu0.1~esm1"},{"binary_version":"3.6.1+dfsg1-1ubuntu0.1~esm1","binary_name":"python3-bson"},{"binary_version":"3.6.1+dfsg1-1ubuntu0.1~esm1","binary_name":"python3-bson-ext"},{"binary_name":"python3-gridfs","binary_version":"3.6.1+dfsg1-1ubuntu0.1~esm1"},{"binary_name":"python3-pymongo","binary_version":"3.6.1+dfsg1-1ubuntu0.1~esm1"},{"binary_name":"python3-pymongo-ext","binary_version":"3.6.1+dfsg1-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-106435.json"}},{"package":{"name":"pymongo","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/pymongo?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.7.1-1.1","3.7.1-1.1build1","3.10.1-0ubuntu2","3.10.1-0ubuntu2.1"],"ecosystem_specific":{"binaries":[{"binary_version":"3.10.1-0ubuntu2.1","binary_name":"python3-bson"},{"binary_version":"3.10.1-0ubuntu2.1","binary_name":"python3-bson-ext"},{"binary_name":"python3-gridfs","binary_version":"3.10.1-0ubuntu2.1"},{"binary_version":"3.10.1-0ubuntu2.1","binary_name":"python3-pymongo"},{"binary_name":"python3-pymongo-ext","binary_version":"3.10.1-0ubuntu2.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-106435.json"}},{"package":{"name":"pymongo","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/pymongo?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.11.0-1build2","3.11.0-1build3","3.11.0-1build4","3.11.0-1ubuntu0.22.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-bson","binary_version":"3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